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    <script>
        //利用函数封装冒泡排序 sort:排序
        function sort(arr) {
            for (var i = 0; i < arr.length - 1; i++) {
                for (var j = 0; j < arr.length - i - 1; j++) {
                    if (arr[i] > arr[i + 1]) {
                        var temp = arr[i];
                        arr[i] = arr[i + 1];
                        arr[i + 1] = temp;
                    }
                }
            }
            return arr;
        }
        var arr1 = sort([1, 3, 2, 7, 4, 100, 9, 13, 312]);
        console.log(arr1); //升序
    </script>
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